Database management method, the data based system, being the database management method of managing

摘要

PROBLEM TO BE SOLVED: To prevent degradation of performance by additional processing of data, while maintaining a high speed property of reading processing of data.SOLUTION: A database includes: a permutation array part A1 indicating permutation of each symbol value by a data identification value in each column; and one or more column data parts B1 configured from data subsets. Each data subset in each column data part B1 includes: each symbol value included in the data subset; a data identification value of each symbol value; an identification value of the data subset; and a flag indicating whether each symbol value in the data subset is in a sort state. When adding the data, each piece of data complying with a data format of the column data part B1 and the permutation array part A1 is generated about the addition target data, and are added to the database.